The ATP announced today that CEO Brad Drewett has passed away at age 54 due to ALS.

“The ATP is deeply saddened to announce that Brad Drewett passed away at his home in Sydney, Australia, earlier today,” said a statement from the ATP. “Brad, who served as ATP Executive Chairman and President since January 2012, had been suffering from Motor Neuron Disease.

“Our thoughts are with Brad’s family on this extremely sad day for them, the ATP and the entire international tennis community. He will be sorely missed by all.”

Drewett was part of the ATP for more than 35 years, as a player, ATP Player Council member, ATP Player Board member, as CEO of the International Region, Tournament Director of the Barclays ATP World Tour Finals, and most recently as the ATP Executive Chairman and President for the last 15 months.

In January the ATP announced Drewett had been diagnosed with ALS and the Australian native would step down from his post.

Drewett was a former Top 40 singles player winning two titles and reaching a career high ranking of No. 34.